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| 型号： | TOP256GN-TL |
| 厂商： | Power Integrations |
| 文件页数： | 7/50页 |
| 文件大小： | 0K |
| 描述： | IC OFFLINE SWIT PROG OVP 8SMD |
| 产品培训模块： | TOPSwitch® HX General Introduction |
| 标准包装： | 1 |
| 系列： | TOPSwitch®-HX |
| 输出隔离： | 隔离 |
| 频率范围： | 119kHz ~ 145kHz |
| 输出电压： | 700V |
| 功率（瓦特）： | 63W |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 8-SMD（7 个接脚），鸥形翼 |
| 供应商设备封装： | SMD-8C |
| 包装： | 标准包装 |
| 配用： | 596-1193-ND - KIT REF DESIGN TOP HX FOR TOP258 |
| 其它名称： | 596-1182-6 |
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TOP252-262
Auto-Restart
+
For R IL = 12 k ?
I LIMIT = 61%
78
Slope = PWM Gain
(constant over load range)
For R IL = 19 k ?
I LIMIT = 37%
DC
Input
Voltage
D
M
See Figure 55b for other
resistor values (R IL ) to
select different I LIMIT values.
-
R IL
S
CONTROL
C
PI-4713-021308
CONTROL
Current
Figure 8.
P/G Package Externally Set Current Limit.
100
reduction, output overvoltage protection (OVP), external current
limit adjustment, remote ON/OFF and device reset. A
connection to SOURCE pin disables all functions on this pin
and makes TOPSwitch-HX operate in simple three terminal
mode (like TOPSwitch-II).
FREQUENCY (F) Pin (TOP254-258Y, and all E and L packages):
Input pin for selecting switching frequency 132 kHz if connected
to SOURCE pin and 66 kHz if connected to CONTROL pin.
55
25
Full Frequency Mode
CONTROL
Current
The switching frequency is internally set for fixed 66 kHz
operation in the P, G, M package and TOP259YN, TOP260YN
and TOP261YN.
132
Variable
Frequency
Low
Frequency
Mode
SIGNAL GROUND (G) Pin (TOP259YN, TOP260YN &
TOP261YN only):
Return for C pin capacitor and X pin resistor.
SOURCE (S) Pin:
66
30
Jitter
Mode
Multi-Cycle
Modulation
I C03 I COFF CONTROL
Output MOSFET source connection for high voltage power
return. Primary side control circuit common and reference point.
I CD1 I B
I C01
I C02
Current
PI-4645-041107
TOPSwitch-HX Family Functional Description
Figure 9.
Control Pin Characteristics (Multi-Mode Operation).
Like TOPSwitch-GX, TOPSwitch-HX is an integrated switched
mode power supply chip that converts a current at the control
input to a duty cycle at the open drain output of a high voltage
power MOSFET. During normal operation the duty cycle of the
power MOSFET decreases linearly with increasing CONTROL
pin current as shown in Figure 9.
In addition to the three terminal TOPSwitch features, such as
the high voltage start-up, the cycle-by-cycle current limiting,
loop compensation circuitry, auto-restart and thermal
shutdown, the TOPSwitch-HX incorporates many additional
functions that reduce system cost, increase power supply
performance and design flexibility. A patented high voltage
CMOS technology allows both the high-voltage power MOSFET
and all the low voltage control circuitry to be cost effectively
integrated onto a single monolithic chip.
Three terminals, FREQUENCY, VOLTAGE-MONITOR, and
EXTERNAL CURRENT LIMIT (available in Y and E/L packages),
www.powerint.com
two terminals, VOLTAGE-MONITOR and EXTERNAL CURRENT
LIMIT (available in M package) or one terminal MULTI-FUNCTION
(available in P and G package) have been used to implement
some of the new functions. These terminals can be connected
to the SOURCE pin to operate the TOPSwitch-HX in a
TOPSwitch-like three terminal mode. However, even in this three
terminal mode, the TOPSwitch-HX offers many transparent
features that do not require any external components:
1. A fully integrated 17 ms soft-start significantly reduces or
eliminates output overshoot in most applications by sweeping
both current limit and frequency from low to high to limit the
peak currents and voltages during start-up.
2. A maximum duty cycle (DC MAX ) of 78% allows smaller input
storage capacitor, lower input voltage requirement and/or
higher power capability.
3. Multi-mode operation optimizes and improves the power
supply efficiency over the entire load range while maintaining
good cross regulation in multi-output supplies.
7
Rev. H 06/13
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| TOP256LN | 功能描述:交流/直流开关转换器 64W (85-264VAC) 88W (230V AC) RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
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| TOP256PG | 功能描述:交流/直流开关转换器 26W/40W PK 85-264VAC 34W/63W PK (230V AC) RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
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